Portion of rotatable arms



FIG. 1 is a perspective view from below of a portion of rotatable arms in accordance with our design;

FIG. 2 is a top plan view of the portion of rotatable arms in accordance with our design;

FIG. 3 is a bottom plan view of the portion of rotatable arms in accordance with our design;

FIG. 4 is a side elevation view of the portion of rotatable arms in accordance with our design, the opposite side being a mirror image of that shown; and,

FIG. 5 is a front perspective view from below of the portion of rotatable arms in accordance with our design.

The broken lines showing environmental structure are for illustrative purposes and form no part of the claimed invention. 

The ornamental design for a portion of rotatable arms, as shown and described. 